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NEW JERSEY — For the second Friday in a row, a bomb threat was called into schools in northern New Jersey, disrupting classes in nine Bergen County school districts.

The Bergen County Sheriff’s Office sent out a tweet stating threats were called into Englewood, Paramus Catholic, Teaneck, Cliffside Park, Mahwah, Waldwick, Hackensack, Ft. Lee and Oradell and to “stay clear pending search.”

Anthony Cureton, public information officer for the Bergen County Sheriffs Office tells us in the end, about 15 schools in three counties — Essex, Bergen and Passaic — were affected.

At 11 a.m., a series of ROBO calls using a computer-generated voice were phoned into the schools, threatening a bomb. Some schools had to be evacuated, others went into shelter-in-place mode and bomb sniffing dogs arrived to comb the school buildings.

Hackensack High School students were evacuated to nearby schools for a short time. They were allowed to return only to be dismissed around 1 p.m.

“They was telling us that they were having the schools cleared of students and letting dogs in to search for bombs,” one Hackensack student said.

At nearby Teaneck High School, the order to “shelter in place” went into effect at 11 a.m. and lasted about 45 minutes.

Students were allowed to move about, but were ordered to stay in their classrooms. Students told PIX11 they looked out the window and saw police with K9s on the grounds.

“They didn’t say it was a bomb threat but out the window I saw like dogs and the policy and stuff so obviously it was a bomb threat,” a sophomore told PIX11.

The all clear was given to all the schools, but not before units were sent to each and every school affected to check out the premises.

One student said she’s grown tired of the hoaxes.

“Apparently they’re all pranks I don’t know why you would even think that funny,” she said. “So annoying. You’re just trying to get through they day and suddenly they tell us we’re bring evacuated.”

Anthony Cureton with the Bergen county sheriffs office said, “this is a disruption to education and resources have to be allocated that may be needed for a real emergency.”

The Bergen County Prosecutor’s Office is heading up the investigation into these false bomb threats.